Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0303f652b05404bb90affc53bc5bfb5a1d9db945d74354fb7d2870ee2bd32494' 
  AND token = 'Zx0sxHJDtf+OwTZ/MaAge5uJj0vCd65qeF2SpQD8mFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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