Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c4051a52e7a603849fb4733879ee58dc278b8eb4c77797616b648fe12aaf086' 
  AND token = 'r7jx1QpL1jATFYVmGEwwU39vCVVPQbaEmfXbH7gX0f8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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