Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dd5e501a8916eb473bb9d8db3781660b0cf014be75c8a79ec92fa9204892ce56' 
  AND token = 'mRCMV0kUNJyAWmtewKM4PRcQ8e0eg2H4jwiWw4a7zNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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