Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b93d2d0ed170b4ce525d34c4f5d745380d9619eef49fe47208cfa3e4645df55c' 
  AND token = '0Cg+2BfeimNQDzv7NQ0/4Kiu1bfn899Xeh9wXEUCFHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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