Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55f1c668e1049f73375a6c342197ce6e941723596daf6a08870332e6f4d0777b' 
  AND token = 'g5mEnL2anzcZg1vwYHVKplTaPedOSOz8G8VNyvbaU3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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