Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc492111f6d0358455aa4d11e53b911f88f4629ab5ca8b019389fbbcccd631a4' 
  AND token = '8qsCfesZPXbxm8Wm937ge/jZ+L68gcHJkBCfqF8p/eA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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