Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63736d447e36719e1b584c9a749d78f4fee9c0004913b4908a7d202fc1bfd064' 
  AND token = '5ucVShKZbx0+cwccNry7Hn2PJ8qXxBfbEnDrV0vJykE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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