Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bd0f00273f7b4d5a6132f76c296f8d2a7397e528400e997c55cf771a5848508' 
  AND token = '2CDU8pLpFYWvrnYLAYTFgnZIhS0c6WoQLskA8v1XrY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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