Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f08cd535184395f14d881937879e897d69f47455ed809f76d10160d23552415d' 
  AND token = '0yTcWFJh5jnp56iCNcF1lj5pRnEFlQJY40tZZFVr3wU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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