Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0cc5ec77e842bf18194f18ad03b7e6dd718b66f6cf4655ea8128104eb366d74' 
  AND token = 'e/igSpEpD6qdkjWdxSLa460mhjNJjuDeY2+7M9j6v8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}