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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95c0aad637793869e050de2bb880c70096b2785c48a0ef39ecfe2093ac236168' 
  AND token = 'Wd0W1P1x7VUY23wwsZNwifoDMrKjN4hykNmighyxRf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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