Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f84b104788616c3f46ff5da0ea8f48f2df76785e34107c5fec704bfda19e6a6' 
  AND token = 'wwpJdKHV3siUz37xAA31JJAH/qIF9vLes726AaPJrrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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