Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '362b7fbb18882c7a66216d15db95ffcb22211dfa8a05a32d8697d800db0bc5a0' 
  AND token = 'GWj6RFRi+hitOgJQmyCZJc0cj8fSqO1FHF1+bTPYAEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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