Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ab86ace2f1ed20eb9d92e4b87d4040e43303ed27856ff2980b13a8296ff105d' 
  AND token = 'thZ6l3oKfBtcTWY3BLdG7EoLNi9XVD1XM2ZlIkhvZbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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