Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dc973debdfb6888c4742d5072008e45bef47899fed0b8c6ba667eb0c01674cbe' 
  AND token = 'IEzOGBXEvbxKMtGhspj9IvxKCo4Jr1sw30piMClGiHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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