Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97e47765f243f3184bef99e484e8a8a9af443e33fbceff16df735e0417e0a028' 
  AND token = 'KiH5Ctn3QPeGOvswFDM7VjkRY+N4o7VG8FbDUK6l4GQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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