Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bc908580abbc9862023af9acfea56ba94cbd2af8f724c657ef689bc48b581fc' 
  AND token = 'XVliN44dGja83MIOd+TpzU4rG9SLwQoaXYcZSl3Yjvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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