Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c24e257716c48262e572f3f33afd5c0ff9916402f71b504f095a745d0bd6f39c' 
  AND token = '1N/CtmlvelOx4UPnH0h8YU35cguYTwC9JpP0xv5HjSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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