Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee1570eb38ad5dd3d37ec6c2df838ac1a74c6d4cd6603bd0d3321d6552f458f9' 
  AND token = 'uHGnN2OMfD43gT00Sqn/65BMl6FSReNZPiIt33cOAGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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