Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a52647d884ae24df82d9c214cebb18f099a0063a3fa9f3b2cc7fc5a68c9d658' 
  AND token = 'CYVych5YF/guKa42/UJD0wKmoKKs2GaeF7GulKM7w1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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