Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '451d79058e262f8eed8c321cbf1e7ecdd4cce92308a05c461b1fc3c059061770' 
  AND token = '1V+C6qiVi1+l2OFA7Y+HvFNUhlMk++NQm7079lvjLXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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