Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f31cf233a461499d602eb1d2725870e2489a17930ffa9e12d44a16e60e58fea8' 
  AND token = 'gXav9vPpDW7uVceW/v8w9bJVmRXpzMQ5EwIFnWwklr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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