Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1e4da71bd7cb6dc3fe8db8e55d9235f41db1d4157a9aafb88aa57ee41ab1c95' 
  AND token = 'j7iDWfjMGxc4xkmR3RIx3zdzQkonAl19MCy1rIg4C7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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