Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9050c975fa37080019adeb262098e3e5508c0aec2ddcabb70893442acabdb81e' 
  AND token = 'lQZuF4EZjkmqHRZvFzEroDPoPZv7Cys4xohdMRNKqgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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