Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2351225364487e2c5aa2e581f31fa5a747f49665728c9251b0c958e262634dc1' 
  AND token = 'EQecYWVaGta6ogRsQl2Sk5Cff8FGKpy6+gGbr81/e6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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