Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a1296921b240c272bd13aaf26c4e7ed6e26743ac207a1c24e1f91678e69af7b' 
  AND token = 'ms8T9aJ3XoQkt4MFDoGgOneMugrfnrOglOsTSuVQSYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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