Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a5c6522b9449281ec211e08d2ce2213a15b5ca10939ecea966a72b050705bbd' 
  AND token = 'rout4Nn3axQ7O44Qo0T2B4F19RmULn45wFkh7cuevNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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