Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da50c00ec707a91508ed09f5367bec4b5689b36f7faad07be351224a462cb113' 
  AND token = '3Nb5VR0aWNjp3IzIGHdYBWrHBImM1y0zQH3UqzTb4jA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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