Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77d7eba006ec0deac49dbcfa7e772f9bcf2614e6b3c94ff57605e3779b1405fa' 
  AND token = '4AS6x7Qq4KPTIwjTKP103MaV6TtQQ7Jf+Bu1qs6H9tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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