Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e918562c644c714d71c137e442c98d516baedff434a830c156d186605629055' 
  AND token = 'rNm2Y6LniBrdfddxEDdRvTliR7S+5h99JhGLx8+37wg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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