Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1382a9197b3d3fa22a426626554a66b356e7c2be2da7462b36b882902ae33f71' 
  AND token = 'qtwsNVYggNTyHqsx90Qb7sdxgGOWdsCBTXL/+U6T9P0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}