Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef69b39b57e720495c8f35b5ef414c11cf0f82c77cbb7a2f097a0b92e1c44a46' 
  AND token = 'S1ISFmvV/0+oaPMD60wjW25Zp8rrPPbESDIowkBznaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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