Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c75b26ea53a773bb2f44a12820ddec6e359b7214623398c7020aaeecb4cb3656' 
  AND token = 'P3umyAIzg6sMVBfFxqKHTNm89sGFrS3MaRrzgOxo1Ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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