Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b246e6b9ccbb68e850d9f283c879dd187a461817b834a44f0344b5e91deb336' 
  AND token = 'tVHeZfEqLZw1S2WVqgbHa0ibV0umcJ5ScCMl0gEOXTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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