Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4f9e6e4b7ef621ada8419ddfef68d9ce7ca37be57c30df820aebba024e3769f' 
  AND token = '9iiQ4YjD2oPp4G07bizgeb1H042mjU9O8mmt5MJ8pdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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