SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eb43f007a8932b51c72c0eb4bc178c361738af595e3e6016dcf637ac6cf44793' 
  AND token = 'DQYHrTF7XSnwqBeQFhZgW4BJVMcdeyXqkFdRPHBloK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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