Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '56e0bf11efae038fd81a59dcf42cd6c3b31cdd2cce6ca6dfbee14a330907ee85' 
  AND token = 'ZCaIsOVyknUwFcf0cjjaly9/iQgvehHl9h4DtVGs43w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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