Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8858a12602e6cb38d623d4ebfa6542e2bcd1cb855609a15f4606501c55f51190' 
  AND token = 'JFaXzED9ozFI8R6dj/ZLvP5BmPLh/AspRBf/bjxAj+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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