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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d044d8ff96e0abc7378bb9bd7943d31f45fc74476ca773d178a2539dd447ee0' 
  AND token = 'HF3hIA1ww+EMWQ+R1kj5IfqohhikTOy7LitHyKw0LF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}