Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '965c634ec6a27b0e3efda38bd9dfc30ad2d52c1d03e9afeb18a916ab63acfd28' 
  AND token = 'a7+XfOYdBsP9BJIN2b3VZTwpCSHuVPFYCrovPxXcRQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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