Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e18b54b7795ccae759e2d4da23e6efe75c02009e2b1a6f54616a1776fe262211' 
  AND token = '5F5oRvgss36kbdpTW8KAy/lEQThz+STr5IbdytF2pPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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