Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '548c6344a847fc59ca7414ef00e8f67acb66f002ca2def93ac2d1c877647a89e' 
  AND token = 'uXv9mA7DLkoIF3NHb7kVbKMyvQysdOWeS8GW9mJjMBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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