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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb95ede55b7e87017bb89d59bbbbc6c13257448000cc6760c6b895f1441f9cfc' 
  AND token = 'dyC2wTpXMK2vLNEF/vKxjwfe4IqmMlho7pKK7C7oasI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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