Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61f898e0ec8860738379e64ce2615096727f136837c1f3bd8fd33bff2b8f2cc6' 
  AND token = 'LX8bmT+S7uVGhy/Db1vC3pcCs36NbpCyNtjMvsZCpa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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