Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '980d431bc7ba613e63acea8c7b199ffb53347fed3facd2da175b3d72e6beb3f0' 
  AND token = 'jMYrq0enPBvetcn8XqoPldk4w1RErYYRx1nPTjK6KhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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