Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '120e38fcbb3422ac5b2debfd17a2011a76218dbae28a0a348f5d5dd787d79671' 
  AND token = 'uZCoby4oaUo6+GK7QbP+5H+Yr/J+8bWTA5n91K1LPUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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