Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d31cd25cebd503993a05bee877b83fea0792864c1826aea76068ed87574afbb' 
  AND token = 'gGrAEEB5Sp8F1s0MnIdJYuUIS5Yk4rr6IpWIwQENBx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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