Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97da1f94293e36c75d1bb5d0454a2d0f3e4b87e4c7081baea21b3fdc45c3ae99' 
  AND token = '/pJebLR8LSMzJI72pGBnQniXyJZ1nKoce0iO06pYCcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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