Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a97825d28e12fccc7467342c24b4b3b86a051dea0c5806ec79d51b5a38ed8fe' 
  AND token = 'q4ZPxum/2F5ujn7VLbR6WNRqSxey5cHO/1PGzaIu/8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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