SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89b319782460267d1625b68bcdee740dad404526ee940d9706c92f10c40a6227' 
  AND token = 'W1EduJkYwe5K5yTHO//Nfjpxn41oZ9l9Gh4N3VI/FBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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