Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae800cb22ba7328ced9005acf9be1859dde86d59f5bdf3be83d7ded8cb72a999' 
  AND token = '1jMpQpg8Iid2shWTQPOaWQnazte/5VT+TIUBTN8Ab1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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