Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '871c2a8ea883adb7da74f805a1b1dc4211aa99ab7f3449a02c368a3b31045a7a' 
  AND token = '2ECDCCaU0m9pyFdUN6miqGEbF6r/+iCjZ5GGN44/XKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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