Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dd0f9d6a4033e40265490fe53b09e6753bd9009ab13a85e09f6580a7ccecfee' 
  AND token = 'W7pxN/b1ixTfqB9gabj0rOTl42BmHvlnmay9Hc6YvW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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