Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52eed5282bbbe9db73bedc84d65cf24da0519a6bbb438af2da0e17365bb2789b' 
  AND token = 'nWfoNf+lIBKsCfm3wg6ZX+MH7YP+toco/76wz78+Amk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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