Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3261ed6db2477fcc2a5cc0b71d1c8cc34e0ab538ae55e557006f79bf50499ed0' 
  AND token = '4VxZp73p5bp3q8NChcHwVz/O4QR+eX+h3AMG0NttKZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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