Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8603405c490494dcdf05de4d93f53af27eedae2d92b0b2cc088479382fc800c' 
  AND token = 'O9GHHPDhJFJIwdECJD4OKaUUvB3bFLthxSiHS3WviSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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