Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d08b040ad100d1dba4179da65bc8ff7a66af38757c249506ffcee96da438ae8' 
  AND token = 'Zq1B+VXOo39rx3UktTUmAn5nyZqQMWUTIuKd7jO3G1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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