Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c99b03f161086de3299f443e3929cafae68e6492f34839a226f35b6107180d4' 
  AND token = 'GLekNCN7vj6r9gkgNIU8ejOUSIOfpDHjR91tkxhs/Nw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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