Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adb020afd0cf4b564944053a95520ec068b9f6d61a72e1d438ab84082a954492' 
  AND token = '4DSDT5oZpVg0yVgoXO0va6juO34ew70MP1MJB9y+07M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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